What is the TreeSet.remove() function in Java?
In Java, TreeSet.remove() is used to remove a particular element from the TreeSet.
The
TreeSet.remove()method is present in theTreeSetclass inside thejava.utilpackage.
Parameters
The TreeSet.remove() method takes the following parameter.
Element: The element to be removed from theTreeSet.elementis of the same data type asTreeSet.
Return value
TreeSet.remove() returns a Boolean value and performs an operation accordingly.
True: When the element is present in theTreeSetand the method removes that element from theTreeSet.False: When the element is not present in theTreeSetand the method doesn’t remove anything.
Example
Let’s understand with the help of an example.
We have TreeSet = [1,8,5,3,9]:
- The first element to remove is 1.
- The second element to remove is 5.
- The third element to remove is 10.
- The fourth element to remove is 9.
The result of the TreeSet.remove() method is [3,8].
In the example above:
- Element 1 = 1, which is present in and gets removed from the
TreeSet. - Element 2 = 5, which is present in and gets removed from the
TreeSet. - Element 3 = 10, which is not present in the
TreeSet, so nothing gets removed fromTreeSet. - Element 4 = 9, which is present in and gets removed from the
TreeSet.
Thus, the TreeSet stores [3,8] in a sorted manner.
Code
Let’s look at the code below.
import java.io.*;import java.util.TreeSet;class Main{public static void main(String args[]){TreeSet<Integer> tree_set = new TreeSet<Integer>();tree_set.add(1);tree_set.add(8);tree_set.add(5);tree_set.add(3);tree_set.add(9);tree_set.remove(1);tree_set.remove(5);tree_set.remove(10);tree_set.remove(9);System.out.println("TreeSet: " + tree_set);}}
Explanation
- In lines 1 and 2, we import the required packages and classes.
- In line 4, we make a
Mainclass. - In line 6, we make a
mainfunction. - In line 8, we declare a
TreeSetofIntegertype. - In lines 9 to 13, we use the
TreeSet.add()method to add the elements into theTreeSet. - In lines 15 to 18, we remove the elements from the
TreeSet. - In line 20, we display the result with a message.
TRENDING TOPICS
